Internal-combustion engine



F. G. GARABELLO INTERNAL COMBUSTION ENGINE July 29, 1930.

Filed June 1929 flncasco G Ga l/126230- Patented July. 29, i 1930 VUNITED STATES- PATENT r'nnnonsoo GIOVANNI GAnAnnLLojoF. TURIN, ITALYINTERNA -COMBUSTION ENGINE Application filed June a, 1929, Serial nssmoeafia inf Italy June j21, 192s'."

like.

In accordance with the present lnventlon the seal of the distributor issecured by means of a frame mounted to move in a seat for thedistributor, said frame being forced on the rotary distributor by thecompression or explosion pressure, while along the frame edge the sealis secured by a flexible member of said seat which is forced by fluidpressure on the edge of said frame.

On the annexed drawing is illustrated by Way of example an embodiment ofthe present invention as applied to an internal combustion engine,and

Figure 1 is a section of the engine along the cylinder and crank shaftaxes;

Figure 2 is a transverse section to an enlarged scale of the cylinderhead and of the distributor on the line 2-2 of Fig. 1;

Figure 3 is a bottom View of the. separate sealing frame.

In the illustrated embodiment, the engine comprises a'casing 1 in whichis mounted a crank shaft 2 actuated by a connecting rod 5 and a piston 3mounted'to reciprocate in cylinder 4. i r V On the head of the enginecylinder 4 which has atop mouth 6, is located a casing 7 in whicharotary distributor 9 is mounted to rotatc by, means of ballbearlngs 8;said distr1butor9 is driven by the engine shaft 2 by means of a gearing10, 11,12, 13, 14 and connects timely the mouth 6 of the cylinder with aduct 15 leading from carburetter (not 1 shown) and with exhaust 16. r

In chamber 7 around the cylinder mouth 6, a sealingframe 18 is mountedto move in a recessed seat 17, it being able tomove' in the direction ofthe engine cylinder axisrthe 7 mouth 6 of the cylinder.

Springs 19 located in recesses provided on the cylinder head, hold theframe 18 permanently forced on thedistributor surface.

Frame 18 has ducts 20 passing through it for "permanently forced on thesurface of distributor 9'to'prevent rattling andduring'thecomseat 17inwhichit is mounted;

'of a suitable pump (not shown) and, tubes 21-22, for the purpose ofcooling frame 18. g Said frame 18 has in its opening asuriface 18parallel with thecylinderaxisand rib 18 "projecting towa'rdsin'sid'e ofmouth 6' (Figs."2 andi3) The mouth 6 of the cylinder isencircled byaperipheral tongue 23, which may besecured. on 'sai'cl mouth or may beobtained from the material providing the cylinder head, and theprojecting portion of said tongue bears on the surface 1850f the frame.

In operation, springs 19' holdthe frame 18 pression and explosionperiodsthe gases under pressure operative in the cylinder 4 also act on theedge 18" ofthe frame 18 and force said framewith heavier action ontheldistrilo- 70 utor to secure seal along theperiphery of the mouth 6of the frame on which thesurface of the distributor slides; atthe sametime the "pressure operates outwardly on the tongue 23 i and forces itonthe portion 18of the frame 5 18 to secure-the seal between the seat1710f the cylinder and the frame and prevent gases from leakingthroughthe gap existing be tween the bottom face of the frame 18 and the Asatisfactory seal is thus secured the distributor 9, beingfmountedinbearings 8, cannotbe forced on the surface of its seat 7 opposite themouth 6"of the cylinder. 7 The tongue 23 may be separate from andfastened on the mouth 6 of the cylinde'ras il lustrated, or it maybeobtained from the material providing the cylinder.

What I claim as my invention and desire to secure by UnitedStatesLetters Patent 1s V i '1. In a reciprocatory machinea cylinder, acasing on said cylinder, said cylinder having a mouth openingin saidcasing and a re- 5 cessed seat encircling said mouth, a rotarydistributor in saidcasing, means for driving said distributor, a frameloose in said seat and encircling said mouth and having a,surfacecontacting with said distributor and a surface subject to the cylinderpressure, and

a tongue on said cylinder mouth subject to cylinder pressure andcontacting with the sur face of said frame.

2. In a reciprocatory machine a cylinder, a casing on said cylinderhaving a mouth opening in said casing and a recessed seatencircling'said mouth, a rotary distributor in said c'asingkinearis fordriving said distributor, a frame loose in said seat and having anorifice registering with said month said frame having a" surfacecontacting with said distributor and a second surface parallel With thedirection of the freeinotionof said frame in said I Ln ing rib on saidfr et. pr re ei around said orifice,

and a pressure receiving tongue onsa'id seat contacting W1th saidsecondv frame surface.

I aim reciprocatory machine a cylinder, a, ca sing on said cylinderhaving a' mouth opening in said casing and a recessed seatencirclingsaid mouth, a rotary distributor in said casing, means fordriving saiddist-ributor, aframe loose in said seat-and having anorifice registering vvith saidinoiith, said ir fi haeing a surfacecontacting With said distributor and a" second surface parallel with thedirection of thefree motion'pf said frame in saidseat, a pressurereceiving rib on Said framearound said orifice, a pressure receivingtongue on said seat contaleting' Witlrsaid second frame surface, andsprings forcing said frameon said distributor.

4, ln a reciprocatory machine a cylinder, a casing on said cylinderhaving'a mouth opening said casing anda recessedseatfencircling saidmouth, a rotary distributor in said casing, means for driving saiddistributor, a frame loose in said seat and an; orifice. registeringwith said month, said framehaving a surface con tacting jvvith Saidjglis'tributor and sec and surfape parallel with the direction of the ime,m t on of I said fIal1 1i .l 11 said Seat, pressure receiving on I saidframe around said orifice, apm'Ssm reCeiv ingetongue oii sai (1 seatcontactin with said second fraine surface, springs forcing said frame onsaiddistributor, said frame ha ing holes alloyving a circulation ofcooling fluid through-said frame, l .e i

testinionyavhereof I have signed my name t'o tliis sp "ficationrmi'fltnsco c ovAimi' cAiiXiitiia

